Safety door for banks



J. B. MITCHELL.

SAFETY DOOR FOR BANKS- APPLICATION FILED NOV. 21, 1919.

Patented Apr. 18, 1922.

NITE

sarn'rx noon ron. names.

' Specification Letters Patent.

' Application filed November 21,1919. Serial no. 339,093.

I To all whom it may concern.

Be it known-that I, JOSEPH B. lllrrormim, a citizen of the-United States of America, residing at Detroit, in the county of Wayne and State of Michi an, have invented certain new and useful Doors for Banks, of which the following is a specification, reference being had therein to the accompanying drawings. I

This invention relates to safety doors for banks and similar institutions, and the primary. objectof my invention is to provide a bulldlng with electrically actuated doors for all of the exits of the building, so that all of the doors may be simultaneously closed 7 to prevent the exit being used, the doors being especially designed to entrap undesir able persons, as robbers, in the building and prevent escape by the exit.

Another object of my invention is to furnish bank doorwayswith doors that may be raised and lowered relative to a cellar, {vault .or other compartment beneath the main floor, and novel means, electrically bankni' g .contr'o ed is employed for raisingthe door.

without any danger of pedestrians or customers entering or leaving the bank being ured by the doors when placed in operation.

A further object of my invention is to furnish a bank with doors thatmay be closed by any of the clerk's or oflicials of the bank, the door opera mechanism being placed in operation by oot pressure and without the use of a hand, so that should robbers entera bank and request the oificials'to hold.

up their hands it is possible for the officials to close all the exits of the bank and prevent escape of the'robbers, it of'course being understood that the windows are barred or of such a nature as'to prevent escape, therethrough.

A still further object or my invention is to provide a burglar trap, including alarms or signals, which prevent the escape of burglars after having entered the trap, and

it is in this connection that my invention aims to prevent the burglarizing of suburban or remote institutions that are without.

police protection. g The above are a few of-the objects attained provements in Safety- Patented Apr. 18 1922.

when a bank is' eqllliipped with my invention,

and others willereinafter appear as the nature of the invention is better understood.

Reference will now be had to the drawing showing a sectional view of a portion of a building having a doorway provided with a door and operating mechanism therefor in accordance with my invention. I

The reference numeral indicates a doorway having a door 66 slidable therein and attached to the sides of the door 66 are cables 67 extendin over sheaves 68 arranged in the side we s of the doorway 65. The cables 67 extends downwardly thro h the floor 69 of the bankin room over s eaves 71 and are attached to rums 72 and adapted to be wound thereon when said drums are revolved by a shaft 73, journaled in bearings 74 on the motor base 75. The shaft 73 has a gear wheel 76 meshing with a gear wheel 77 operated by a motor '7 8 on the base 7 5, and when the motor is placed in operation the door 66 is raised in the doorway 65. The upward movement of the door 66 is cushioned by spring pressed buffers 79 in the top of the doorway 65, said buffers re venting the door from being slammed s ut.

I provide slide lat'chesg80zon the ceiling of the compartment in which the motor-78 is located, said slide latches being retained in a retracted position by the side edges of the door 66, but immediately upon the door reaching a closed position the slide latches 80 are released to extend under the lower edge of the door and lock it in aeclosed posi generally designated 81 and 82, theswitch -81 being in circuit with the'motor 78, a signal 83 and treadle switches 84.

The switch 82 is in circuit with a signal '85 and a suitable source of electrical energy 86, and the switches'81 and 82 are adapted to be closed by a trip member 87 at the lower edge of the door 66,- the switch 81 bei closed in advance of the switch 82.

' atI claim is:

In a bank building, a wall provided with a doorway, a floor provided with an opening at said doorway, a door slidable in said door way and the floor opening and adapted to switch remote from said doorway adapted V for placing the motor operated cables in op- 10 oration to raise the door.

In testimony whereof I afiix my signature in the presence of two witnesses.

JOSEPH B. MITCHELL.

Witnesses: P

- KARL H. BUTLER, ANNA M. Donn. 

